Device for burning pulverized coal.



No. 739,957, PATENTED SEPT. 29, 1903. ,B. J. WALKER.

DEVICE FOR BURNING PULVERIZED GOAL.

. APIFLIOKTION FILED 00117 1902.

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PATENTED SEPT. 29 B. J. WALKER. DEVICE FOR BURNING PULVERIZED GOAL.

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No. 739,957. r "PATENTED SEPT. 29, 19031" I B. J. WALKER.

, DEVICE FOR BURNING PULVERIZED 'GOAL.

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Patented September 29, 1903; I:

PATENT ()FEICE.

BENJAMIN'JQW'ALKER, OF ERIE, PENNSYLVANIA.

DEVICE FOR BURNING: PULVERIZED COAL.

SPECIFICATION forming part of Letters Patent No. 739,957, dated September 29, 1903. 7

Application filed October 17, 1902. Serial No. 127,684. (No model.)

fication.

This invention relates to devices for burn-- ing pulverized coal; and it consists in certain lmprovements in the construction thereof, as willbe hereinafterful'lydescribed,and pointed outin the claims.

' More especially, the invention relates to a means for so introducing pulverized coal to.

a furnace in a scattered condition as to induce proper combustion. 7 Heretofore great difficulty has been experienced in '"devisin g means whereby fuel of this character might be completely burned, and any failure in producing perfect combustfon results infthe formation of coke. This clogs the. furnace and fines and produces smoke. apparatusesfor'burnin g'this class of fuel have had a limited use.

I have found that an apparatus which will sustain the fuel in suspension during combustion will accomplish perfect results. I provide anapparatus which will accomplish this'by opposing the blasts which carry the fuel. This may be done by introducing the blasts, at directly opposite sides of the furnace. By this meansparticles are thoroughly scattered and the blast is prevented from acting upon any of the walls of the furnace so as to cool it sufficiently toform coke. here single blasts have been used as heretofore, the action of the blast upon. the wall opposite it has been such as to; produce coke, beginning at the wall and extending out toward the blast. Myapparatus entirely obviates this difficulty and is perfectly feasible under boilers and in devices having extensive flues.'- It also operates successfully on fuel in which the particles are much larger than has been heretofore accomplished. V

The invention is illustrated in theaccompanying drawings, as follows:

Figure 1 shows a central section of a feeding device on the line 1 1 in Fig. 2. Fig.2

. shows a section on the line 2 2 in Fig. 1. Fig.

'3 shows a plan View of the flight mechanism.

For this reason Fig. at shows a section on the line 4. 4 in Fig. 5 of a furnace to which the apparatus is attached; Fig. 5, a section on the line 5 5 in Fig. 4.

Any blast mechanism may be used; but I prefer that shown in the application of John F. Hay, of this date, which may be described as follows:

A marks the receptacle in which the fuel is placed. The platform A is at the bottom. A shaft D rotates in said receptacle. is secured tothis shaft and carries flights B B and O O, flights B B being arranged-to'move "the material initially into the path of the flights 0 O and the flights QC being arranged to move the material into the dischargeopening A The web covers the flights, and this, with the wall 17 prevents the direct flow :of the material into the discharge-opening, A blast-pipe F is arranged across the dis- A web 12 charge-opening', a deflector being arranged fro prevent the flow of the blast into the receptacle' A. The blastF is provided witha T F and the pipes F extend from this T to the entering points F at the opposite sides of the furnace G. The furnace is provided with a draft-opening g, justbelow the points 1 V and the door g, from which the slag may be removed. A bridge-wall II is arranged at the rear of the furnace, and, as shown, the boiler I is arranged over the furnace, with a smokestack J. 7 I In operation the fuel is fed-by the feeding device described into the blast-pipe and by thenblast through the pipes F and into the furnace from opposite sides. The meeting of the blasts at the center prevents either blastfrom impinging directly against any of the walls of the furnace. Therefore there is no point in thefurnace which is cooled sufficiently to prevent proper combustion, and as a result a furnace so constructed will burn properly-pulverized coal containing much larger particles than has heretofore been used'in this class of apparatuses.

By the term firebox I wish to include any furnace or chamber in which the combustion takes place. i

hat I claim as new is- 1. The combination with a fire-box; and a feeding and blast mechanism; of a means for delivering pulverized coal to the fire-box ICO der blastin directly-opposed jets of sufficient force to spread the fuel by the impact of the jets, said fire-box being provided with a draft-opening leading directly to the combustion part of said box.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

BENJAMIN J. WALKER.

Witnesses:

H. C. LORD, J. F. HAY. 

